It’s not often that the US or UK governments weigh in on the browser wars, but a new Internet Explorer vulnerability — one that affects all major versions of the browser from the past decade — has forced them to raise an alarm: Stop using IE. The zero-day exploit, the term given to a previously unknown, unpatched flaw, allows attackers to install malware on your computer without your permission.

Security Debrief is a blog dedicated to homeland security, terrorism and counter-terrorism, intelligence and law enforcement that provides context to the debates, policies and politics that are playing out in Washington, D.C.